Growth and Deline

How come in many societies, they rise to huge power and then deline?
 
I feel like looking back in history at the Maya and the Romans and how their empire fell, from such huge power.  They both had such a succussful adanvance society.  Time is everything, I feel like every society will fall, its just in the catorgie of time.  And when it is going to fall.  Like the societys now will come to an end.  At the best will also be the worst.  From a graph form, a downword slope from the peat of the societys.  Like in life, or everyday there is a peat or a pit of everybodies day.    From such a powerful society like the Romans and the Maya, the societies now, will fall too.  Its not like history repeats itself, it slitly changes itself.  The downfall of scoiety like cultrual, economic, and also social.  I wonder when society will fall now, and people look at the societys now that fall.

Also like Malaria, we had something like it too, but it was called Swine Fly or H1N1.  The time that present time is now, people dont get as sick.  They can save people with shoots and other mechiaine.  If that was back then it was so many people would have died because it is an airborn.  Or if there wasnt good medichane a lot more poputaion would have been wiped out.  People now are so lucky that they live in this time.  If linguists look at medichans now present time, and say that it is weird and stupid.  Just like when kids study the medichances back when they used leafs and stuff.

With good empires and societys there is always a downcline of a slope.  And something good at the peat, will always go down, in the matter of time.  Times is really everything.  People dont appeicate is as much, then they should.